Add Classified Brief 0x02 and remove hardcoded toolchains

0x0014a_cb/include/gpio_ctrl.h

@@ -0,0 +1,26 @@
+/**
+ * @file gpio_ctrl.h
+ * @brief GPIO hardware control interface for Operation Zero Hour ESA
+ * @author Kevin Thomas
+ * @date 2026
+ *
+ * MIT License
+ * Copyright (c) 2026 Kevin Thomas
+ */
+
+#ifndef GPIO_CTRL_H
+#define GPIO_CTRL_H
+
+#include <stdbool.h>
+
+#define LED_RED_PIN       16
+#define LED_GREEN_PIN     17
+#define TAMPER_WIRE_PIN   15
+
+void init_gpio(void);
+void set_led_armed(void);
+void set_led_safe(void);
+void set_led_tamper_flash(bool state);
+bool is_tamper_wire_intact(void);
+
+#endif /* GPIO_CTRL_H */